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Jit64: boolX - Special case xor with 0

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No computation necessary, but we may need a MOV.

Before:
8B FE                mov         edi,esi
83 F7 00             xor         edi,0

After:
8B FE                mov         edi,esi
This commit is contained in:
Sintendo
2021-01-25 22:59:14 +01:00
parent 3677a5035c
commit c9011e9d2c
1 changed files with 12 additions and 4 deletions
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10
Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp
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@@ -687,11 +687,19 @@ void Jit64::boolX(UGeckoInstruction inst)
RCOpArg Rj = gpr.Use(j, RCMode::Read); RCOpArg Rj = gpr.Use(j, RCMode::Read);
RCX64Reg Ra = gpr.Bind(a, RCMode::Write); RCX64Reg Ra = gpr.Bind(a, RCMode::Write);
RegCache::Realize(Rj, Ra); RegCache::Realize(Rj, Ra);
if (imm == 0)
{
if (a != j)
MOV(32, Ra, Rj);
needs_test = true;
}
else
{
if (a != j) if (a != j)
MOV(32, Ra, Rj); MOV(32, Ra, Rj);
XOR(32, Ra, Imm32(imm)); XOR(32, Ra, Imm32(imm));
} }
}
else if (is_and) else if (is_and)
{ {
RCOpArg Rj = gpr.Use(j, RCMode::Read); RCOpArg Rj = gpr.Use(j, RCMode::Read);